戊二醛合成体系气相色谱分析

本文给出了环戊烯合成戊二醛体系的气相色谱分析方法，色谱柱为硅烷化担体载１０％ＰＥＧ－２０Ｍ固定液，氢火焰检测器，列出了标准曲线和检测条件，变异系数均〈１．５％，相对误差±２．０％以内，该定量分析快速，简便，准确。     

酸直接溶解——ICP—AES测定润滑油中磨损铁

介绍了采用盐酸将润滑油中磨损铁溶入水相中，ＩＣＰ－ＡＥＳ测定铁含量的方法，试验表明，经本方法处理的试样组成简单，干扰少，ＩＣＰ条件容易选择，测定结果准确度和重复性良好。     

Recent Advances in Organic Reactions Catalyzed by Lanthanide（Ⅲ） Complexes

Lanthanide compounds have been attracting much attention in organic synthesis.Chiral Ln-substituted BINOL have been widely studied in several asymmetric organic reactions.LnCl3 and Ln(OTf)3 have been expected to serve as Lewis acide and have been applied to many important synthetic reactions in a one-pot manner,Ln(O-i-Pr)3 exhibits some basic characters,which also can be utilized in some special organic transformation.This article deals with some lanthanides(Ⅲ）complexes promoted organic reactios,which we have recently developed.     

基于核酸适配体功能化荧光氧化石墨烯的免标记“Turn-off”型Hg2+传感器研究

利用湿化学法制备出具有一定荧光性能的氧化石墨烯(GO)负载金纳米颗粒(AuNPs)复合材料(GO@AuNPs),并将巯基化单链富T核酸适配体(aptamer)结合在该复合材料的金纳米颗粒表面,形成aptamer功能化氧化石墨烯-金纳米颗粒复合物(aptamer-GO@AuNPs)。当汞离子存在时,由于7个T-Hg~(2+)-T结构的配位作用,aptamer折叠形成刚性的发夹状双链DNA结构,并使Hg~(2+)靠近石墨烯表面(少于1 nm),使得电子可沿着双链DNA通道从石墨烯转移到汞离子,从而猝灭氧化石墨烯的荧光,由此构建了一种基于石墨烯荧光猝灭的"turn-off"型荧光传感器。考察了多种因素对检测体系的影响,在最优实验条件下,此方法对Hg~(2+)的线性检测范围为0.5～80 nmol/L,检出限为0.3 nmol/L。应用于环境水体样品中Hg~(2+)的检测,加标回收率为96.0%～105%,相对标准偏差为1.4%～3.2%。该方法操作简单,有较强的抗干扰能力,灵敏度和选择性高,不需要标记,检测快速,可用于环境水体样品中Hg~(2+)的高灵敏检测。     

Fabrication of Co/CoO Exchange Bias System by Ion Implantation and Its Magnetic Properties

We use ion implantation as a new approach to build an anti-ferromagnetic （AFM） cluster embedded exchange bias （EB） system. Co film with thickness of 130nm is deposited on the Si （111） substrate using magnetron sputtering, 60keV O＋ is chosen to implanted into the Co film to form CoO AFM clusters coupling with Co matrix at the interface. By measuring the hysteresis loop after field-cooling, significant shifts of loop along the applied field are confirmed. When increasing the implantation dose to 2×1017/cm2 and annealed samples in N2 atmosphere, we obtain the highest HEB to 458Oe.     

New Technique for Mixed Potential Integral Equation Formulation inMultilayered Media and Its Application of Electrically Small Antennas Connected with Vertical Via-Holes

We present an effective technique for mixed potential integral equation formulations in multilayered media. In terms of the dipole source method, the formulations of Green functions in spectral domain are restructured concisely, a proper integration path is chosen to straightforwardly apply the two-level discrete complex image method and the high order Sommerfeld identities yield very accurate results of Green functions in the spatial domain for general electric and magnetic sources in three-dimensional multilayered media. Finally, it is used to design a realistic low temperature co-fired ceramic aperture coupled antenna with vertical via-holes connected at the Ka band.     

中国科学院金属有机化学开放实验室

该室1989年建成开放。现有固定人员36名,其中研究人员30名、技术人员4名、管理人员2名;流动人员48名,其中研究生38名、博士后7名、客座研究人员3名。实验室中有中国科学院青年科学家奖获得者2人、香港求是杰出青年学者获得者2人。实验室目前有400兆核磁共振仪1台、X衍射四园衍射仪1台、高效液相色谱2台、气相色谱1台、毛细管电泳1台、红外分析仪1台及旋光仪1台。实验室研究方向是:开展对金属有机化学的基础研究。设计并合成新型的金属有机化合物,研究其结构及反应性能;研究金属—碳键,金属—氢键等的形成及其化学转化;开拓导向有机合成反应…     

Synthesis of Boron-Rich Cubic B（CxN1-x） Compounds

B2CN precursor is prepared by a mechanical vibration-milling process using amorphous boron, graphite and h-BN powders with mole ratio of 1：1：1. A mixture of precursor and Ca3B2N4 catalyst is treated under high pressure and high temperature. A boron rich cubic B（CxN1-x） phase is obtained after removing the catalyst by acid treatment. The average C content of the boron-rich cubic phase is about 6 at.% detected by energy-dispersive x-ray analysis spectroscopy. It is found that the highest carbon content in the cubic phase is as large as 16 at.%.     

缩减类序列生成器的存储空间

针对缩减类序列目前研究存在的主要问题,利用概牢理论和时间攻击技术分析了输出率为1/r的缩减类生成器的存储空间,指出具有该输出率的缩减类型序列生成器的存储空间不能为空.当存储器空间足够大时,生成器才能以接近于1的概率正常加密.另一方面研究了缩减类生成器抵抗时间攻击的能力,指出缩减类型的生成器必须具备一定的存储空间才能够抵抗时间攻击.     

磁驱动准等熵加载装置CQ-4的加载能力及主要应用

利用脉冲大电流与其自身磁场相互作用产生磁压实现对样品平面等熵压缩,是国外新发展起来的动高压加载技术。CQ-4装置是在自然科学基金仪器专项资助下,建立的国内首套可实现110GPa等熵压缩,宏观金属飞片发射达15km/s的紧凑型脉冲功率装置。本文重点介绍该装置的主要性能和加载能力,以及基于其上开展的材料高压本构、相变、未反应炸药等力学行为等应用研究情况。